Hi! One of my rhododendron is root bound in a medium sized pot. It has grown very fast over the past 2 years. I don't want to buy a larger pot as the one it's in was meant to be it home for some years to come at least. I mean the pot it is in was not cheap. It has finished flowering and been dead headed. It was looking ok until tonight when I checked it the leaves are drooping and curling slightly. So I believe this is due to the tight position of the roots. Can I lift it out and trim the roots now or do I have to wait until it is dormant bearing in mind the drooping leaves.? I have watered it as it felt dry also. Thank you.
Unfortunately you will need to increase the container of your potted Rhododendron to ensure it's continued health.
This article will help you.